US12280351B2 - Substrate for nucleic acid amplification, and method for manufacturing same - Google Patents

Substrate for nucleic acid amplification, and method for manufacturing same Download PDF

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US12280351B2
US12280351B2 US17/259,821 US201917259821A US12280351B2 US 12280351 B2 US12280351 B2 US 12280351B2 US 201917259821 A US201917259821 A US 201917259821A US 12280351 B2 US12280351 B2 US 12280351B2
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carbon atoms
nucleic acid
substrate
acid amplification
metal layer
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US20210268468A1 (en
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Oh Seok Kwon
Tai Hwan Ha
Kyung Ho Kim
Jin Yeong Kim
Seon Joo Park
Seong Eun SEO
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Korea Research Institute of Bioscience and Biotechnology KRIBB
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Korea Research Institute of Bioscience and Biotechnology KRIBB
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • C12Q1/6813—Hybridisation assays
    • C12Q1/6834—Enzymatic or biochemical coupling of nucleic acids to a solid phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0046—Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L7/00—Heating or cooling apparatus; Heat insulating devices
    • B01L7/52—Heating or cooling apparatus; Heat insulating devices with provision for submitting samples to a predetermined sequence of different temperatures, e.g. for treating nucleic acid samples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
    • B01J2219/00277—Apparatus
    • B01J2219/00279—Features relating to reactor vessels
    • B01J2219/00331—Details of the reactor vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
    • B01J2219/00277—Apparatus
    • B01J2219/00497—Features relating to the solid phase supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
    • B01J2219/00718—Type of compounds synthesised
    • B01J2219/0072—Organic compounds
    • B01J2219/00722—Nucleotides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/06—Fluid handling related problems
    • B01L2200/0647—Handling flowable solids, e.g. microscopic beads, cells, particles
    • B01L2200/0663—Stretching or orienting elongated molecules or particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • B01L2300/0819—Microarrays; Biochips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/12—Specific details about materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/16—Surface properties and coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/18—Means for temperature control
    • B01L2300/1861—Means for temperature control using radiation

Definitions

  • the present invention relates to a substrate for nucleic acid amplification, and a method for manufacturing same.
  • a polymerase chain reaction (PCR) method is technique allowing amplification of a specific region of DNA or RNA to a large amount in vitro.
  • a PCR machine using such technique is used for the amplification of a small amount of DNA included in blood in hospitals, research centers, etc., and the PCR machine is also used for diagnosing various diseases including malaria, tuberculosis, hepatitis, etc.
  • PCR is conducted through one cycle of three steps including denaturation, annealing and elongation, and the rapid rise and drop of temperature in line with the temperature suitable for each step is very important for reducing PCR reaction time. That is, PCR requires the instant shift of the temperature in line with the temperature set for each step, but if time delay is generated during the process for changing the temperature to the preset temperature, a reaction rate is degraded, total PCR reaction time increases, and there are problems of arising unnecessary reactions to produce by-products. Particularly, the decrease of the PCR time enables prompt diagnosis on the spot of infectious diseases which are recently spread rapidly, and plays an important role of serving early disinfection.
  • Korean Laid-open Patent Publication No. 2017-0106995 discloses a light energy-based PCR system, but there are problems in that PCR is performed in a liquid phase, multiple diagnoses in one chamber is impossible, and the recovery of a used primer is impossible. Particularly, due to a high price, the enlargement of the apparatus and long detection time (1 hour or more), the conventional PCR machine is inconvenient to carry, and immediate diagnosis on the spot is limited.
  • the present invention has been devised to solve the above-described problems and provides a substrate for nucleic acid amplification serving stable and rapid multiple PCR reactions by immobilizing a primer on the surface of a metal layer using an N-heterocyclic carbene compound as a linker, while amplifying nucleic acid using thermal energy generated by irradiating light energy.
  • the present invention provides a substrate for nucleic acid amplification including a transparent matrix, a metal layer formed on the transparent matrix, an N heterocyclic carbene compound having one end bonded to the surface of the metal layer and a primer immobilized on the other end of the N-heterocyclic carbene compound.
  • the present invention provides a method for manufacturing a substrate for nucleic acid amplification, including forming a metal layer on a transparent matrix, introducing one end of an N-heterocyclic carbene compound onto the surface of the metal layer, and immobilizing a primer on the other end of the N-heterocyclic carbene compound.
  • PCR reaction may be more stable at high temperature and completed in a very short time when compared with a case of using a linker by the bond between a metal and thiol (—SH).
  • the recovery of a primer after the PCR reaction is easy, and various types of primers could be immobilized on the N-heterocyclic carbene compound at the surface of each metal layer, and thus, the simultaneous amplification of diverse nucleic acids is possible, and there are advantages of performing multiple PCR reactions.
  • FIG. 1 is a diagram schematically showing a series of light-based PCR reaction using the substrate for nucleic acid amplification of the present invention.
  • FIG. 2 is a diagram schematically showing a light-based PCR machine on a solid phase using the substrate for nucleic acid amplification of the present invention.
  • FIG. 3 is a diagram showing a gold (Au) layer formed on a transparent matrix included in the substrate for nucleic acid amplification of the present invention.
  • FIG. 4 is a diagram showing 1 H-NMR spectrum of N-heterocyclic carbene compound 1 prepared according to Preparation Example 1 of the present invention.
  • FIG. 5 is a diagram showing 1 H-NMR spectrum of N-heterocyclic carbene compound 2 prepared according to Preparation Example 2 of the present invention.
  • FIG. 6 is a diagram showing 1 H-NMR spectrum of N-heterocyclic carbene compound 3 prepared according to Preparation Example 3 of the present invention.
  • FIG. 7 is a diagram showing 1 H-NMR spectrum of N-heterocyclic carbene compound 4 prepared according to Preparation Example 4 of the present invention.
  • FIG. 8 is a diagram showing 1 H-NMR spectrum of N-heterocyclic carbene compound 5 prepared according to Preparation Example 5 of the present invention.
  • FIG. 9 is a diagram showing time required for performing 40 cycles of PCR reaction according to Examples 1 and 2 of the present invention.
  • FIG. 10 is a diagram showing XPS elemental analysis results of a gold (Au) layer on which N-heterocyclic carbene compound 4 bonded according to Example 1 of the present invention.
  • FIG. 11 is a diagram schematically showing a series of process for immobilizing a primer on a gold (Au) layer using N-heterocyclic carbene compound 4 according to the present invention.
  • FIG. 12 is a diagram schematically showing a series of process for immobilizing a primer on a gold (Au) layer using N-heterocyclic carbene compound 4 of the present invention.
  • FIG. 13 is a diagram showing a transparent matrix and a metal layer formed on the transparent matrix according to an embodiment of the present invention.
  • FIG. 14 is a diagram showing a transparent matrix and a metal layer formed on the transparent matrix according to an embodiment of the present invention.
  • FIG. 15 is a diagram showing time required for performing 40 cycles of PCR reaction according to Example 3 of the present invention.
  • FIG. 16 is a diagram showing detection results using a fluorescence material after performing PCR reaction according to Example 1 of the present invention.
  • FIG. 17 is a diagram showing detection results using a fluorescence material after performing PCR reaction according to Example 2 of the present invention.
  • FIG. 18 is a diagram showing detection results using a fluorescence material after performing PCR reaction according to Example 3 of the present invention.
  • FIG. 19 is a diagram showing detection results using a fluorescence material after performing PCR reaction according to Comparative Example 1 of the present invention.
  • FIG. 20 is a diagram showing a transparent matrix including a gold mesh according to an embodiment of the present invention.
  • FIG. 21 is a diagram showing time required for performing 40 cycles of PCR reaction in case of including a metal mesh as in FIG. 20 .
  • FIG. 22 is a diagram showing electrophoretic results confirming the completion of PCR reaction after performing PCR reaction according to Example 1 of the present invention.
  • the present invention provides a substrate for nucleic acid amplification including: a transparent matrix; a metal layer formed transparent matrix; an N-heterocyclic carbene compound having one end bonded to the surface of the metal layer; and a primer immobilized on the other end of the N-heterocyclic carbene compound.
  • the substrate for nucleic acid amplification may be used in polymerase chain reaction (PCR) which is molecular biological technique for duplicating and amplifying a desired segment of DNA or RNA.
  • PCR polymerase chain reaction
  • the first step of PCR is a step for denaturing DNA (or RNA). Two strands of DNA may be separated by heating, and each separated DNA plays the role of a template.
  • the denaturation temperature is generally 90° C. to 96° C., but is changed according to the amount of bases G+C in DNA and the length of DNA.
  • the second step of PCR is a step of annealing. In this step, two types of primers are annealed to each complementary template DNA.
  • the annealing temperature is an important factor for determining the accuracy of reaction, and if the temperature is too high, the primer may be annealed on DNA too weakly, and the product of amplified DNA may be very small.
  • the primer may be non-specifically annealed, and undesired DNA may be amplified.
  • General annealing temperature is 50° C. to 65° C.
  • the third step of PCR is a step of elongation. In this step, DNA polymerase resistant to heat produces new DNA in template DNA. In this case, the elongation temperature is 70° C. to 75° C. As described above, there are a series of three steps in the PCR reaction, and if the three steps are set to 1 cycle, the PCR reaction is performed by about 30 to 40 cycles.
  • the substrate for nucleic acid amplification may be used in light-based PCR using thermal energy produced by the irradiation of light energy during the above-described PCR.
  • the temperature of the metal layer in which plasmons are excited as described above may be elevated to maximum 500° C., and a PCR specimen solution around the metal layer may be heated to 150° C. or more in a short time.
  • the transparent matrix may be manufactured so that light irradiated from a light source positioned under a counter surface to the metal layer formed is transferred to the metal layer without loss, and adhesiveness with the metal layer is excellent.
  • the transparent matrix may be formed using a transparent material so as to transmit light irradiated, and may be formed using a material which is hardly deformed by light or heat.
  • a transparent material so as to transmit light irradiated
  • a material which is hardly deformed by light or heat Preferably, a glass matrix, a plastic matrix, a silicon matrix, etc., may be used, but is not limited thereto.
  • the transparent matrix has a constant thickness, and the thickness of the transparent matrix may be from 0.1 mm to 10 mm, preferably, from 0.5 mm to 5 mm, more preferably, from 0.5 mm to 1.5 mm. If the thickness of the transparent matrix satisfies the above-described range, thermal energy by light energy irradiated from a light source may be efficiently transferred, and a PCR reaction cycle may be optimized.
  • the transparent matrix may include a two-dimensional matrix of a planar type; a three-dimensional matrix selected from a spherical type, a hemispherical type, a polyhedral type, a polyprism type, or a cylindrical type; or a mixture type thereof.
  • the transparent matrix may include a matrix of a mixture type of a three-dimensional matrix in which at least one partial surface of the polyhedral matrix type includes a hemispherical type matrix.
  • the transparent matrix includes the three-dimensional matrix as described above, PCR reaction may be performed at many faces, and there are advantages in that diverse nucleic acids may be amplified simultaneously, and multiple diagnosis may be possible.
  • the substrate for nucleic acid amplification may utilize a metal layer for utilizing thermal energy by the irradiation of light energy.
  • the temperature may be instantly elevated to maximum 500° C., and the temperature change in the temperature range (from about 50° C. to 95° C.) of the PCR cycle may be promptly conducted.
  • the metal layer may include a metal thin film.
  • the metal layer may further include a metal mesh.
  • the metal mesh may be formed first on the transparent matrix, and then the metal layer may be formed on the metal mesh.
  • prompt heating and cooling may be possible when compared with a case of using only a metal layer, the temperature change of a PCR cycle may be promptly conducted, and more efficient PCR reaction may be performed.
  • the temperature change in the temperature range (from about 50° C. to 95° C.) of the PCR cycle may be promptly conducted, and as in FIG. 21 , it could be confirmed that the time required for performing 40 cycles of the PCR reaction is significantly short and about 7 minutes.
  • the metal layer may be formed on at least one face of the transparent matrix.
  • the metal layer may be formed on the whole face of the at least one face of the transparent matrix, or may be partially formed on the at least one face of the transparent matrix. That is, on the transparent matrix, one metal layer may be formed, or multiple metal layers may be formed.
  • the metal mesh may have a two-dimensional or three-dimensional structure, and in this case, the mesh may include a polygonal pattern including a triangle, a tetragon, a pentagon and hexagon, or a circular pattern.
  • the length of one side of the mesh may be from 50 to 200 ⁇ m, and in case where the mesh includes a circular pattern, the diameter of the mesh may be from 50 to 200 ⁇ m.
  • the spacing of the mesh may be from 1 to 5 ⁇ m, particularly, 1 to 2 ⁇ m.
  • the thickness of the metal mesh may be from 10 nm to 200 nm, particularly, from 100 to 200 nm. In case where the thickness of the metal mesh and the size of the mesh satisfy the above-described ranges, prompt heating and cooling may become possible, and the temperature change of the PCR cycle may be promptly conducted when compared with a case of using only a metal layer.
  • the metal layer may include any one selected from the group consisting of copper (Cu), silver (Ag), gold (Au), palladium (Pd), platinum (Pt), rhodium (Rh) and combinations thereof (for example, bimetallic nanoparticles).
  • gold (Au) which has excellent bonding properties with an N-heterocyclic carbene compound and stability and rapid light-absorption, may be included.
  • the method of coating the metal layer on one side of the transparent matrix may use any coating or deposition technique without limitation, and the transparent matrix may be formed into a uniform thickness by a method of chemical vapor deposition (CVD), physical vapor deposition (PVD), thermal evaporation deposition, sputtering deposition or atomic layer deposition (ALD).
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • ALD atomic layer deposition
  • the thickness of the metal layer may be from 10 nm to 200 nm. If the thickness of the metal layer is greater than the range, there are problems in that the metal layer may be damaged during the step of immobilizing a linker, or a linker may be non-uniformly formed.
  • a gold (Au) layer formed on the transparent matrix is shown in FIG. 3 .
  • an N-heterocyclic carbene compound As a linker for immobilizing the primer on the surface of the metal layer, an N-heterocyclic carbene compound may be used.
  • the N-heterocyclic carbene compound may be introduced onto the surface of the metal layer through a metal-carbene bond.
  • the N-heterocyclic carbene compound may be represented by Chemical Formula 1 or 2 below.
  • At least one of R1 and R2 and at least one of R5 and R6 may be the same or different, and may be each independently an alkyl group of 1 to 20 carbon atoms or an aryl group of 6 to 30 carbon atoms.
  • At least one of R1 and R2 and at least one of R5 and R6 may be the same or different, and may be each independently isopropyl or benzyl.
  • R3, R4, R7, R8, R9 and R10 may be the same or different, and may be each independently hydrogen, an alkyl group of 1 to 20 carbon atoms, a cycloalkyl group of 3 to 20 carbon atoms, an aryl group of 6 to 30 carbon atoms, a heteroaryl group of 2 to 30 carbon atoms or the structure represented by Chemical Formula 3, or two or more adjacent substituents among R7 to R10 may be bonded to form a hydrocarbon ring.
  • R3, R4, R7, R8, R9 and R10 may be the same or different, and may be each independently hydrogen or the structure represented by Chemical Formula 3, or two or more adjacent substituents among R7 to R10 may be bonded to form a hydrocarbon ring.
  • At least one carbon forming the hydrocarbon ring may be substituted with the structure represented by Chemical Formula 3.
  • At least 41 and R4 may be the structure represented by Chemical Formula 3.
  • at least one of R7 to R10 may be the structure represented by Chemical Formula 3.
  • n is a repeating number of the unit in parenthesis and may be an integer of 1 to 30, preferably, 1 to 10. More preferably, 1 to 3.
  • the A is a nitrogen (N)-containing alkyl group of 1 to 20 carbon atoms, or a nitrogen (N)-containing heteroaryl group of 2 to 30 carbon atoms.
  • A may be azide, phthalimide, or amine.
  • an “adjacent” group may mean a substituent directly coupled with an element at which a corresponding substituent is substituted, a sterically most nearly positioned substituent to the corresponding substituent, or another substituent substituted at an element at which the corresponding substituent is substituted.
  • two substituents substituted at ortho position in a benzene ring, and two substituents substituted at the same carbon in an aliphatic ring may be interpreted as the “adjacent” group.
  • the alkyl group may be a linear chain or a branched chain, and the carbon number may be 1 to 20, preferably, 1 to 10. More preferably, the carbon number may be 1 to 6.
  • Particular examples of the alkyl group may include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methylbutyl, 1-ethylbutyl, pentyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethyl butyl, 2-ethylbutyl, heptyl, n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclo
  • the cycloalkyl group may have 3 to 20 carbon atoms, preferably, 3 to 10 carbon atoms.
  • Particular examples of the cycloalkyl group may include cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, etc., but is not limited thereto.
  • the aryl group may have 6 to 30 carbon atoms, preferably, 6 to 10 carbon atoms.
  • the aryl group may be a monocyclic aryl group or a polycyclic aryl group.
  • Particular examples of the monocyclic aryl group may include a phenyl group, a biphenyl group, a terphenyl group, etc.
  • particular examples of the polycyclic aryl group may include a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group, a triphenylene group, etc., but is not limited thereto.
  • the heteroaryl group is an aromatic ring group including one or more selected from N, O, P, S, Si and Se as heteroatoms, and the carbon number may be 2 to 30, preferably, 2 to 20.
  • Particular examples of the heteroaryl group may include a thiophene group, a furan group, a pyrrole group, an imidazole group, a thiazole group, an oxazole group, an oxadiazole group, a triazole group, a pyridyl group, a pyrimidyl group, a triazine group, a triazole group, an acridyl group, a quinolinyl group, quinazoline group, a quinoxalinyl group, a phthalazinyl group, an isoquinoline group, an indole group, a carbazole group, a benzoxazole group, a benzimidazole group, a benzothiazole group, a be
  • alkyl group, the cycloalkyl group, the aryl group, the heteroaryl group or the hydrocarbon ring may be further substituted or unsubstituted with an alkyl group, a cycloalkyl group, an aryl group or a heteroaryl group.
  • a metal-carbene bond may be formed by a method of chemical vapor deposition (CVD), physical vapor deposition (PVD), thermal evaporation deposition, sputtering deposition, atomic layer deposition (ALD) or chemical-bath deposition (CBD).
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • ALD atomic layer deposition
  • CBD chemical-bath deposition
  • FIG. 11 a series of mechanism of bonding one end of the N-heterocyclic carbene compound on the surface of the metal layer by a chemical vapor deposition method is shown in FIG. 11
  • FIG. 12 a series of mechanism of bonding one end of the N-heterocyclic carbene compound on the surface of the metal layer by a chemical-bath deposition method is shown in FIG. 12 .
  • a primer may be bonded and immobilized.
  • the other end of the N-heterocyclic carbene compound may be functionalized with azide, phthalimide, or amine.
  • a primer may be bonded to the azide, phthalimide, or amine using click reaction as shown in FIGS. 11 and 12 . Accordingly, in contrast to the general bonding of the primer with the metal layer by an electrostatic attraction, the primer may be immobilized onto the metal layer through a stronger chemical bond, and if used in the PCR reaction of a solid phase of high temperature, effects of excellent stability, and improved storability and ease of storage may be achieved.
  • the primer may be a primer of at least one type.
  • the primer of at least one type may mean any one selected from primers which may make complementary bond with different amplification target template DNA (or RNA).
  • the primer may be a primer of two or more different types.
  • the primer is the primer of two or more different types, any one among a pair of primers which may make complementary bond with a first template DNA (or RNA) to be amplified, and any one among a pair of primers which may make complementary bond with a second template DNA (or RNA) to be amplified.
  • the first template DNA (or RNA) and the second template DNA (or RNA) may mean DNA (or RNA) having different base sequences.
  • the present invention also provides a method for manufacturing a substrate for nucleic acid amplification, including: forming a metal layer on a transparent matrix; introducing one end of an N-heterocyclic carbene compound onto the surface of the metal layer; and immobilizing a primer on the other end of the N-heterocyclic carbene compound.
  • FIG. 1 is a diagram schematically showing a series of a process of light-based PCR reaction using the substrate for nucleic acid amplification of the present invention.
  • the schematic explanation on a process for performing the light energy-based PCR reaction using the substrate for nucleic acid amplification of the present invention is as follows, but the PCR reaction is not limited only to the method described below.
  • a PCR specimen including amplification target template DNA, dNTP, Taq polymerase, etc. is prepared.
  • Two types of primers (forward primer, reverse primer) making complementary bond with the template DNA are prepared.
  • a portion of the forward primer is immobilized by bonding with the end of the transparent matrix/metal layer/N-heterocyclic carbene compound linker, which is the substrate for nucleic acid amplification of the present invention, and the remaining forward primer and reverse primer are included in the PCR reaction specimen.
  • light energy is irradiated by a light source (LED, etc.) positioned under the transparent matrix, and PCR reaction is performed.
  • LED light source
  • the N-heterocyclic carbene compound is attached onto the surface (solid phase) of the metal layer as a linker, and then the primer is immobilized, and accordingly, stability at high temperature is better in contrast to a linker by the bonding of the metal and thiol (—SH), and thus, the application to a PCR machine using thermal energy converted from light energy is possible, prompt temperature control of the metal layer by the irradiation of light energy is possible, and the PCR reaction may be completed within a very short time with about 12 minutes to 15 minutes for performing 40 cycles for the PCR reaction.
  • the primer of at least one type (or a primer of different two types)
  • different from PCR which is performed only in a liquid phase the substrate for nucleic acid amplification may be easily recovered after the PCR reaction, and the storage of the primer is easy, and the regeneration thereof is possible.
  • N-heterocyclic carbene compound 1 was prepared.
  • N-heterocyclic carbene compound 2 was prepared.
  • N-heterocyclic carbene compound 3 was prepared.
  • N-heterocyclic carbene compound 5 was prepared.
  • FIG. 8 the 1 H-NMR spectrum of N-heterocyclic carbene compound 5 is shown.
  • a lung cancer cell line As template DNA, a lung cancer cell line, cDNA of A549 was used, and a PCR reactant of a liquid phase including dNTP, Taq polymerase, a reverse primer below and a forward primer below was prepared.
  • N-heterocyclic carbene compound 4 prepared in Preparation Example 4 a forward primer below was immobilized on the surface of a gold (Au) layer deposited by CVD on a planar type glass matrix.
  • the substrate on which the forward primer was immobilized was put in a PCR reactant of a liquid phase, which included a relatively small amount of the forward primer, and by using the machine of FIG. 2 , PCR reaction of 40 cycles was performed.
  • the time required for performing 40 cycles of the PCR reaction is shown in FIG. 9 , and 5 ⁇ l of the PCR reaction resultant was loaded on 1 wt % of an agarose gel, and electrophoresis (Mupid 2Plus of GenomicBase Co.) was performed under conditions of 100 V and 20 minutes.
  • electrophoresis Mopid 2Plus of GenomicBase Co.
  • Example 1 PCR reaction was performed by the same method in Example 1 except for using a mutated lung cancer cell line, cDNA of NCI-H-1975 instead of the lung cancer cell line, CDNA of A549, as the template DNA.
  • Example 1 PCR reaction was performed by the same method in Example 1 except for using a hexahedral glass matrix as in FIG. 13 and FIG. 14 instead of the planar type glass matrix.
  • PCR reaction was performed by the same method in Example 1 except for performing the PCR reaction without the template DNA.
  • Example 3 which used the hexahedral glass matrix, a sufficient PCR product was produced within about 8 to 9 minutes, and the generation of fluorescence was confirmed.

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